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<h1>fibonacci</h1>
<p>returns the specified element of the Fibonacci sequence. The first number of the sequence is 0, the second number is 1, and each  subsequent number is equal to the sum of the previous two numbers. Fn = Fn-1 + Fn-2 </p>
<h2>parameters:</h2>
<ol>
  <li>The element you would like to get.</li>
</ol>